대한조선학회지 (Bulletin of the Society of Naval Architects of Korea)
- 제12권2호
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- Pages.43-58
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- 1975
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- 1225-1178(pISSN)
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- 2765-2858(eISSN)
압연강판(壓延鋼板)의 피로균열(被虜龜裂) 전파거동(傳播擧動)에 대(對)한 연구(硏究)
A Study on the Propagation Behaviour of the Fatigue Cracks in Rolled Steel Plates
초록
There are many reports on fatigue crack of metallic materials but most of them relate crack propagation rate to stress intensity factor. The problem of crack propagation is not yet clarified, especially the bridge between micro and macro phenomena In this experiment rotating bending fatigue tests have been carried out with smoothed specimen of rolled steel plates including 0.2% carbon under application of three stress conditions to investigate the slip band and the crack propagation behaviour. The results obtained are as follows; 1) The length of cracks which have grown at initial crack tips can be expressed as follows;
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